Heating device comprising an electrode for the conductive heating of melts

A heating apparatus for the conductive heating of melts, in particular for the rapid melting-down, refining and/or conditioning of melts, is provided. The heating apparatus includes at least one electrode, as well as a first cooling system with a cooling power, which can be set and/or controlled variably.

BOROSILICATE GLASS HAVING IMPROVED HYDROLYTIC RESISTANCE FOR PREFERRED USE IN THE PHARMACEUTICAL SECTOR

Borosilicate glasses, preferably for use in the pharmaceutical sector, are provided. The borosilicate glasses are outstandingly suitable for the use as pharmaceutical primary packaging, such as phials or ampoules, since the aqueous or water-containing medicaments kept in the containers do not attack the glass significantly, and so the glass releases no, or only few, ions. The borosilicate glasses have the following composition in % by weight or consist thereof: 2. The borosilicate glass according to claim 1 , wherein the KO content is in the range from 0.1 to 0.88% by weight.3. The borosilicate glass according to claim 1 , wherein the KO content is in the range from 0.2 to 0.75% by weight.4. The borosilicate glass according to claim 1 , wherein the SiOcontent is in the range from 72 to 77% by weight.5. The borosilicate glass according to claim 1 , wherein the SiOcontent is in the range from >74 to 77% by weight.6. The borosilicate glass according to claim 1 , wherein the AlOcontent is 5.6 to 7.8.7. The borosilicate glass according to claim 1 , wherein the AlOcontent is 6.0 to 7.2% by weight.8. The borosilicate glass according to claim 1 , wherein the BOcontent is in the range from 10 to 12% by weight.9. The borosilicate glass according to claim 1 , wherein the BOcontent is in the range from 10.5 to 11.5% by weight.10. The borosilicate glass according to claim 1 , wherein the LiO content is in the range from 0 to 0.2% by weight.11. The borosilicate glass according to claim 1 , wherein the LiO content is 0.12. The borosilicate glass according to claim 1 , wherein the CaO content is in the range from 0.1 to 1.3% by weight.13. The borosilicate glass according to claim 1 , wherein the CaO content is in the range from 0.3 to 0.8% by weight.14. The borosilicate glass according to claim 1 , wherein the BaO content is in the range from 0 to 1.0% by weight.15. The borosilicate glass according to claim 1 , wherein the ZrOcontent is in the range from 0 to 2% by weight.16. The ...

Method and apparatus for manufacturing glass tubes having a predetermined inner profile, preferably for continuously manufacturing such glass tubes

The invention relates to a method and apparatus for manufacturing glass tubes having a predetermined inner profile according to a Vello-method or Down-Draw-method, wherein molten glass 6 emerges from an outlet orifice 12 of a melt feed 2 and is drawn over a shaping body 3 so as to form a hollow drawing bulb 50, and the drawing bulb 50 is drawn over a profile forming body 4 positioned downstream of the shaping body 3 to form the predetermined inner profile. In order to enable a reliable and riskless positioning of the profile forming body 4 in an operational position within the drawing bulb 50, according to the invention the profile forming body 4 is moved in axial direction either from below the shaping body 3 via the inner space of the glass tube 5; 5′ or via an inner bore 31 of a shaft 30 supporting said shaping body until reaching an operational position in the inner space of said glass tube 5; 5′.

TOUGHENABLE GLASS WITH HIGH HYDROLYTIC RESISTANCE AND REDUCED COLOR TINGE

Glasses and glass products suitable for pharmaceutical packaging are provided and methods of making and using such glass and glass products are provided. The glasses combine chemical temperability with very good hydrolytic resistance as well as reduced color tinge. The invention also includes methods for the production of such glasses and their uses. 1. A silicate glass , comprising:{'sup': '2', 'a threshold diffusivity D of at least 6 μm/hour;'}a hydrolytic resistance corresponding to at most 80% of a limit type I according to USP660/Glass Grains;{'sub': 2', '3, 'a composition comprising at least 12 ppm FeObased on mol-%; and'}a sum of a z-value and an x-value that is higher than a y-value by a factor of at least 1.5 according to a CIE 1931 color space when measured at a sample thickness of 1 mm.2. The glass of claim 1 , wherein the composition comprises less than 500 ppm of TiO.3. The glass of claim 1 , wherein the composition comprises from 0.4 mol-% to 5 mol-% of ZrO.4. The glass of claim 1 , wherein the composition comprises less than 1 mol-% of BO.5. The glass of claim 1 , wherein the composition comprises a molar proportion of AlOthat is higher than a molar proportion of NaO.6. The glass of claim 1 , wherein the composition comprises a sum of molar proportions of alkali metal oxides that is lower than a molar proportion of AlO.7. The glass of claim 1 , wherein the composition comprises a molar ratio of CaO to a sum of CaO and MgO that is larger than 0.5.9. The glass of claim 2 , wherein the composition comprises less than 1 mol-% of BO.10. The glass of claim 2 , wherein the composition comprises a molar proportion of AlOthat is higher than a molar proportion of NaO.11. The glass of claim 2 , wherein the composition comprises a sum of molar proportions of alkali metal oxides that is lower than a molar proportion of AlO.12. The glass of claim 1 , wherein the composition comprises a molar ratio of CaO to a sum of CaO and MgO that is larger than 0.5.13. The glass ...

Method and device for refining a glass melting

A method and apparatus for refining a glass melting with a vacuum generated above a surface of a glass flux. Refinement is improved because the glass flux is conducted sequentially through several vacuum chambers, and the pressure in the successive vacuum chambers is reduced more and more relative the atmospheric pressure.

PHARMACEUTICAL PACKAGING COMPRISING A CHEMICALLY RESISTANT GLASS

A pharmaceutical packaging is provided including a glass, comprising at least the following components (given in mol % on oxide basis): SiO:59-84, AlO:7-18.5, CaO:1-25, SrO:0-6.5, BaO:0-5, ZrO:0-3, TiO:0-5, BO:0-1, wherein the ratio (CaO+SrO+BaO)/AlO<2.8, wherein the ratio (CaO+SrO+BaO)/SiO≦0.39, wherein the hydrolytic resistance according to DIN ISO 720 is class HGA 1, and wherein the glass, apart from unavoidable contaminations, is free of alkali oxides and magnesium oxides. 2. The pharmaceutical packaging of claim 1 , wherein the ratio (CaO+SrO+BaO)/AlOis smaller than 2.3.3. The pharmaceutical packaging of claim 1 , wherein the ratio (CaO+SrO+BaO)/AlOis larger than 1.9.4. The pharmaceutical packaging of claim 1 , wherein the ratio (CaO+SrO+BaO)/SiO>0.25.5. The pharmaceutical packaging of claim 1 , wherein the content of BaO≦3.6. The pharmaceutical packaging of claim 1 , wherein the content of AlOis smaller than 12 mol %.7. The pharmaceutical packaging of claim 1 , wherein the content of AlOis larger than 9 mol %.8. The pharmaceutical packaging of claim 1 , wherein the content of CaO is larger than 15 mol %.9. The pharmaceutical packaging of claim 1 , wherein the content of SrO is smaller than 4 mol %.10. The pharmaceutical packaging of claim 1 , wherein the total content of TiO+ZrOis at least 0.5 mol %.11. The pharmaceutical packaging of claim 1 , wherein the total content of TiO+ZrOis 6 mol % at most.12. The pharmaceutical packaging of claim 1 , wherein the content of SiOis larger than 60 mol %.13. The pharmaceutical packaging of claim 1 , wherein the content of SiOis smaller than 70 mol %.15. The pharmaceutical packaging of claim 1 , which comprises a maximum processing temperature T4 of 1350° C.16. The pharmaceutical packaging of claim 1 , wherein a weight loss according to DIN ISO 720 is smaller than 50 μg NaO/g.17. The pharmaceutical packaging of claim 1 , wherein the hydrolytic resistance according to DIN ISO 720 is HGA1.18. The pharmaceutical packaging of ...

Low-boron zirconium-free neutral glass having an optimized alkali metal ratio

A zirconium-free neutral glass is provided that finds use in the pharmaceutical sector. The glass has a combination of alkali metal oxides of sodium, potassium and optionally lithium, and a controlled amount of aluminium oxide, which provides a zirconium-free and low-boron neutral glass having good hydrolytic stability, good acid and alkali stability and good devitrification properties. The glass includes the following components in % by weight: 2. The neutral glass according to claim 1 , wherein the SiOhas a content in a range from 75% to 81% by weight.3. The neutral glass according to claim 1 , wherein the SiOhas a content in a range from 77% to 80% by weight.4. The neutral glass according to claim 1 , wherein the BOhas a content in a range of 3%-6.5% by weight.5. The neutral glass according to claim 1 , wherein the BOhas a content in a range of 3.5%-5.5% by weight.6. The neutral glass according to claim 1 , wherein the AlOhas a content in a range from 5% to 7.5% by weight.7. The neutral glass according to claim 1 , wherein the components do not contain any BaO.8. The neutral glass according to claim 1 , wherein the NaO has a content in a range of 2.8%-4.8% by weight.9. The neutral glass according to claim 1 , wherein the KO has a content in a range of 4%-8% by weight.10. The neutral glass according to claim 1 , wherein the KO has a content in a range of 4.2%-7.8% by weight.11. The neutral glass according to claim 1 , comprising 3.5% by weight of NaO and 6.5% by weight of KO.12. The neutral glass according to claim 1 , wherein the LiOhas a content in a range of 0%-0.5% by weight.13. The neutral glass according to claim 1 , further comprising a sum total of alkali metal oxides in a range between 6.8% and 13.3% by weight.14. The neutral glass according to claim 1 , further comprising a sum total of alkali metal oxides in a range between 7.0% and 12.6% by weight.15. The neutral glass according to claim 1 , wherein the KO/NaO ratio is in a range from 0.8 to 2.9.16. ...

Process for producing alkali metal-rich aluminosilicate glasses, alkali metal-rich aluminosilicate glasses and use thereof

The invention relates to a process for producing alkali metal-rich aluminosilicate glasses having a content (in mol % based on oxide) of alkali metal oxides of 4-16 mol %, of Al2O3 of at least 4 mol % and of B2O3 of 0-4 mol %, wherein 0.15 mol % to 0.9 mol % of chloride(s) and at least one refining agent from the group of sulfate(s) (reported as SO3), CeO2 are added to the glass batch and wherein the sum total of refining agents added in the batch is 0.17 mol % to 1.3 mol %.

Borosilicate glass having improved hydrolytic resistance for preferred use in the pharmaceutical sector

Borosilicate glasses, preferably for use in the pharmaceutical sector, are provided. The borosilicate glasses are outstandingly suitable for the use as pharmaceutical primary packaging, such as phials or ampoules, since the aqueous or water-containing medicaments kept in the containers do not attack the glass significantly, and so the glass releases no, or only few, ions. The borosilicate glasses have the following composition in % by weight or consist thereof: SiO 2 71-77; B 2 O 3 9-12; Al 2 O 3 5.5-8; Na 2 O 6-8; K 2 O 0.1-0.9; Li 2 O 0-0.3; CaO 0-1.5; BaO 0-1; F 0-0.3; Cl- 0-0.3; and MgO + CaO + BaO + SrO 0-2.

In a method of making glass, a method and device for the control and setting of the redox state of redox fining agents in a glass melt

There is now provided a method and a device for the control and setting of the redox state of redox fining agents in a glass melt, in which method, during the melting process, essentially oxygen gas is blown through the glass melt.

Apparatus for forming glass tubes, a heating chamber and a process for the manufacture of an apparatus for forming glass tubes

An apparatus for forming glass tubes is provided. The apparatus includes a Danner-pipe, a heating device, and a heating chamber having the Danner-pipe and the heating device arranged therein. The Danner-pipe is inclined with respect to a horizontal plane by a Danner-angle. The heating device is inclined with respect to the horizontal plane by a heating-angle. The Danner-angle and/or the heating angle are in a range of 1° to 45°.

Process and device for production of molten glass

According to the invention, measures will be taken to lead the current of the molten glass through the tank furnace so that cutoffs of the glass current between the surface of the glass bath, on the one hand, and the outlet opening on the other hand are avoided and a an equal holding period of all melt particles in the tank furnace is achieved.

Borosilicate glass article with low boron content

A chemically temperable borosilicate glass article has a low boron content and a corresponding Na2O content. The articles have good diffusivities and hydrolytical resistance values. When chemically tempered, the borosilicate glass article exhibits a compressive stress CS >400 MPa and a penetration depth DoL >20 μm. A pharmaceutical primary packaging including the borosilicate glass article is also disclosed.

GLASS ROD, SET OF GLASS RODS, AND PROCESS FOR THE PRODUCTION OF A GLASS ROD

A glass rod includes: a glass including a glass composition, wherein the total relative length variation of the semi-major axis tlvmajor is determined as an absolute difference between (a) a smallest semi-major axis length Imajor(n) and (b) a largest semi-major axis length Imajor(n), normalized by the average semi-major axis length lmajor(a); wherein the 50 equidistant cross-sections are positioned along the length lrod of the glass rod, starting at a position of 0.01*lrod as a first position and employing a plurality of additive increments of 0.02*lrod for each subsequent position; wherein the relative local area variation lav is determined as an absolute difference between (c) a cross-sectional area that has the largest semi-major axis length Imajor(n) and (d) an average value of the cross-sectional areas, normalized by an average value of the cross-sectional areas; wherein the quality index (tlvmajor+lav) is 0.090 or less.

Heating apparatus with electrode for the conductive heating of melts

A heating apparatus for the conductive heating of melts, in particular for the rapid melting-down, refining and/or conditioning of melts, is provided. The heating apparatus includes at least one electrode, as well as a first cooling system with a cooling power, which can be set and/or controlled variably.

APPARATUS FOR FORMING GLASS TUBES, A HEATING CHAMBER AND A PROCESS FOR THE MANUFACTURE OF AN APPARATUS FOR FORMING GLASS TUBES

An apparatus for forming glass tubes is provided. The apparatus includes a Danner-pipe, a heating device, and a heating chamber having the Danner-pipe and the heating device arranged therein. The Danner-pipe is inclined with respect to a horizontal plane by a Danner-angle. The heating device is inclined with respect to the horizontal plane by a heating-angle. The Danner-angle and/or the heating angle are in a range of 1° to 45°.

METHOD OF MAKING HIGH QUALITY GLASS PRODUCTS FROM HIGH VISCOSITY MELTS

A method of making glass products includes: heating material to obtain a glass melt; heating the glass melt in a melting tank having a melting tank bottom, the glass melt having a melt volume, a melt surface, and a viscosity of 102 dPas at a temperature above 1580° C. The glass melt is heated such that at least some of the glass melt has a viscosity of 102.5 dPas or less. An amount of thermal energy introduced directly into the melt volume is more than 60% of a total amount of thermal energy introduced into the glass melt. A maximum difference between a temperature at a location on the melt surface and a temperature at a location at the melting tank bottom vertically underneath the location on the melt surface is such that a difference in glass melt densities is less than 0.05 g/cm3 per meter distance between the locations.

Method and apparatus for manufacturing glass tubes having a predetermined inner profile, preferably for continuously manufacturing such glass tubes

The method produces glass tubes having a predetermined inner profile according to a Vello-method or Down-Draw method, wherein molten glass emerges from an outlet orifice of a melt feed and is drawn over a shaping body to form a hollow drawing bulb, and the drawing bulb is drawn over a profile forming body downstream of the shaping body to form the predetermined inner profile. To enable a reliable, risk-free positioning of the profile forming body within the drawing bulb, the profile forming body is axially moved either from below the shaping body via an inner space of the glass tube or via an inner bore of a shaft supporting the shaping body until reaching an operational position in the inner space of the glass tube. An apparatus for performing the method is also described.

Method and device for refining a glass melt using negative pressure

The apparatus for reduced-pressure refining of a glass melt includes a refining bank formed so that a reduced pressure is generated by a glass flow in it. The refining bank has a component, which is made from a refractory metal or refractory alloy acting as glass-contact material. The refractory metal or alloy contains molybdenum, tungsten, tantalum, and/or hafnium. The device of the present invention includes a protective gas reservoir for a protective gas and an automatically operating valve connecting the reservoir with the refining bank so that an inner side of the component that would otherwise be exposed when a pressure rise or a falling glass melt column occurs is protected from oxidation by the protective gas. A process for using the device during refining of the glass melt is also part of the invention.

METHOD FOR ERADICATING PATHOGENS

A glass has a transmittance at a wavelength of 220 nm of at least 30% and a transmittance at a wavelength of 200 nm of less than 4.0%, the glass having a total platinum content of less than 3.5 ppm. A device and a sterilizer include a light source configured to output ultraviolet light and a lamp cover covering the light source and including the glass.

Low-boron zirconium-free neutral glass having an optimized alkali metal ratio

A zirconium-free neutral glass is provided that finds use in the pharmaceutical sector. The glass has a combination of alkali metal oxides of sodium, potassium and optionally lithium, and a controlled amount of aluminum oxide, which provides a zirconium-free and low-boron neutral glass having good hydrolytic stability, good acid and alkali stability and good devitrification properties. The glass includes the following components in % by weight: SiO 2  72-82, B 2 O 3   3-8, Al 2 O 3   5-8, Na 2 O 2.5-5.5, K 2 O 3.6-8.4, Li 2 O   0-0.7, MgO   0-0.7, CaO   0-0.4, and TiO 2   0-5, wherein Li 2 O + Na 2 O + K 2 O 6.8-14.6, and K 2 O/Na 2 O ratio 0.7-3.4.

CHEMICALLY RESISTANT BORON- AND ALKALI-FREE GLASSES

A glass includes a composition which is characterized by the following constituent phases of the glass: 20-80 mol % silicon dioxide; 0-40 mol % wollastonite; 0-30 mol % cordierite; 0-40 mol % anorthite; 0-40 mol % strontium-feldspar; 0-20 mol % celsian; 0-40 mol % hardystonite; 0-10 mol % titanite; and 0-15 mol % gittinsite. Where the composition is specified in mol % relative to oxides, the glass contains less than 11.5 mol % AlOand less than 5000 ppm (molar, relative to the oxides) of each of BO, LiO, NaO, KO, RbO and CsO. A calculated value for the removal rate according to ISO 695 is not more than 81.9 mg/(dm3 h) and a calculated value for the removal rate in acid according to DIN12116 is less than 3.5 mg(dm6 h). 1. A glass , comprising:a composition which is characterized by the following constituent phases of the glass:silicon dioxide 20-80 mol %;wollastonite 0-40 mol %;cordierite 0-30 mol %;anorthite 0-40 mol %;strontium-feldspar 0-40 mol %;celsian 0-20 mol %;hardystonite 0-40 mol %;titanite 0-10 mol %; and{'sub': 2', '3', '2', '3', '2', '2', '2', '2', '2, 'sup': 2', '2, 'gittinsite 0-15 mol %, wherein where the composition is specified in mol % relative to oxides, the glass contains less than 11.5 mol % AlOand less than 5000 ppm (molar, relative to the oxides) of each of BO, LiO, NaO, KO, RbO and CsO, wherein a calculated value for the removal rate according to ISO 695 is not more than 81.9 mg/(dm3 h) and a calculated value for the removal rate in acid according to DIN12116 is less than 3.5 mg(dm6 h).'}2. The glass of claim 1 , wherein a wollastonite content of the composition is at least 1 mol %.3. The glass of claim 2 , wherein the wollastonite content is at least 5 mol %.4. The glass of claim 1 , wherein a cordierite content of the composition is at least 1 mol %.5. The glass of claim 1 , wherein an anorthite content of the composition is at least 1 mol %.6. The glass of claim 5 , wherein the anorthite content is at least 10 mol %.7. The glass of claim 1 ...

Process for production of molten glass

The invention concerns a process and a device from the production of molten glass. According to the invention, measures will be taken to lead the current of the molten glass through the tank furnace so that cutoffs of the glass current between the surface of the glass bath, on the one hand, and the outlet opening on the other hand are avoided and a an equal holding period of all melt particles in the tank furnace is achieved.

DEVICE AND PROCESS FOR PRODUCING A GLASS PRODUCT AND GLASS PRODUCT

A method for producing a glass product is provided. The method includes providing a glass melt; hot forming the glass melt to obtain a glass product; and transferring the glass melt from a first region to a second region through a tube. The tube has a part that protrudes with a length into the glass melt in the first region. The part being at a distance from an inner base lying directly thereunder. The length and the distance are configured so that little defective glass gets into the tube and is transferred to the second region. 1. A method for producing a glass product , comprising the steps of:providing a glass melt;hot forming the glass melt to obtain a glass product; andtransferring the glass melt from a first region to a second region through a tube, the tube having a part that protrudes with a length into the glass melt in the first region, the part being at a distance from an inner base lying directly thereunder, wherein the length and the distance are configured so that little defective glass gets into the tube and is transferred to the second region.2. The method of claim 1 , further comprising transferring the glass melt from the second region to a third region through another tube having a part that protrudes with a length into the glass melt in the second region claim 1 , the part being at a distance from an inner base lying directly thereunder claim 1 , wherein the length and the distance are configured so that little defective glass gets into the tube and is transferred to the third region.3. The method of claim 2 , further comprising transferring the glass melt from the third region to a fourth region through yet another tube having a part that protrudes with a length into the glass melt in the third region claim 2 , the part being at a distance from an inner base lying directly thereunder claim 2 , wherein the length and the distance are configured so that little defective glass gets into the tube and is transferred to the fourth region.4. The ...

Process For Producing Alkali Metal-Rich Aluminosilicate Glasses, Alkali Metal-Rich Aluminosilicate Glasses and Use Thereof

The invention relates to a process for producing alkali metal-rich aluminosilicate glasses having a content (in mol % based on oxide) of alkali metal oxides of 4-16 mol %, of AlOof at least 4 mol % and of BOof 0-4 mol %, wherein 0.15 mol % to 0.9 mol % of chloride(s) and at least one refining agent from the group of sulfate(s) (reported as SO), CeOare added to the glass batch and wherein the sum total of refining agents added in the batch is 0.17 mol % to 1.3 mol %. 1. Process for producing alkali metal-rich aluminosilicate glass having a content (in mol % based on oxides) of alkali metal oxides of 4-16 mol % , of AlOof at least 4 mol % and of BOof 0-4 mol % ,comprising the process steps of formulating a batch with addition of at least two refining agents, melting the batch and then hot-forming the molten batch, characterized in that{'sub': 3', '2, 'the at least two refining agents comprise a) 0.15 mol % to 0.9 mol % of chloride(s) and b) at least one compound from the group of sulfate(s) (reported as SO) and CeO, where the sum total of refining agents added in the batch is 0.17 mol % to 1.3 mol %.'}2. Process according to claim 1 ,characterized in that0.17 mol % to 0.8 mol % of refining agents is added to the batch.3. Process according to claim 1 ,characterized in that0.01 mol % to 0.08 mol % of sulfate(s) is added to the batch.4. Process according claim 1 ,characterized in that{'sub': '2', '0.01 mol % to 0.1 mol % of CeOis added to the batch.'}5. Process according to claim 1 ,characterized in that{'sub': 2', '3', '2', '3, 'neither AsOnor SbOis added to the batch.'}6. Process according to claim 1 ,characterized in thatthe batch is melted at a temperature of at least 1640° C.8. Process according to claim 1 ,characterized in that{'sub': 2', '2', '2, 'neither BaO, nor SrO, nor LiO, nor ZrO, nor SnOis intentionally added to the batch.'}11. Process according to claim 1 ,characterized in thatthe chloride(s) is an alkali metal chloride, an alkaline earth metal chloride or ...

BOROSILICATE GLASS ARTICLE WITH LOW BORON CONTENT

A chemically temperable borosilicate glass article has a low boron content and a corresponding Na 2 O content. The articles have good diffusivities and hydrolytical resistance values. When chemically tempered, the borosilicate glass article exhibits a compressive stress CS >400 MPa and a penetration depth DoL >20 μm. A pharmaceutical primary packaging including the borosilicate glass article is also disclosed.

Method and device for refining a glass melt using negative pressure

The invention relates to a method and a device for refining a glass melt, using negative-pressure apparatus. According to the invention, the glass melt is fed to a refining bench by means of an uptake pipe and is discharged from the refining bench by means of a downpipe, a negative pressure being created over the flow of glass in the refining bench. The invention is characterised in that the uptake pipe and/or the downpipe and/or the refining bench has/have at least one component consisting of at least one refractory metal and/or of a refractory metal alloy as the glass contact material.

Pharmaceutical packaging comprising a chemically resistant glass

A pharmaceutical packaging is provided including a glass, comprising at least the following components (given in mol % on oxide basis): SiO2: 5 9-84, Al2O3: 7-18.5, CaO: 1-25, SrO: 0-6.5, BaO: 0-5, ZrO2: 0-3, TiO2: 0-5, B2O3: 0-1, wherein the ratio (CaO+SrO+BaO)/Al2O3<2.8, wherein the ratio (CaO+SrO+BaO)/SiO2≤0.39, wherein the hydrolytic resistance according to DIN ISO 720 is class HGA 1, and wherein the glass, apart from unavoidable contaminations, is free of alkali oxides and magnesium oxides.

GLASS HAVING HIGH UV TRANSMITTANCE AND HIGH SOLARIZATION RESISTANCE

A glass includes SiOin an amount of at least 60.0 wt.-% and an amount of WOfrom 0.1 ppm to 60.0 ppm. Tungsten is present in such oxidation states that a transmittance of the glass at a wavelength of 260 nm is at least 75.0%. 1. A glass , comprising SiOin an amount of at least 60.0 wt.-% and an amount of WOfrom 0.1 ppm to 60.0 ppm , and tungsten is present in such oxidation states that a transmittance of the glass at a wavelength of 260 nm is at least 75.0%.4. The glass of claim 1 , wherein the glass comprises less than 10 ppm FeO.5. The glass of claim 1 , wherein the glass comprises less than 10 ppm TiO.6. The glass of claim 1 , wherein the glass comprises less than 10 ppm NiO.7. The glass of claim 1 , wherein the glass comprises less than 10 ppm CrO.8. The glass of claim 1 , wherein the glass comprises Cl in an amount of more than 100 ppm.9. The glass of claim 1 , wherein a proportion of ZrOin the glass is less than 0.5 wt.-%.10. The glass of claim 1 , wherein a transmittance of the glass at a reference thickness of 1.0 mm at a wavelength of 260 nm after irradiation with the HOK 4 lamp for 144 hours is at least 59.0%.13. The glass of claim 1 , wherein a partial pressure of oxygen (pO) in a glass melt at a temperature of 1500° C. is 0.5 bar or less claim 1 , when the glass melt is produced from the glass by inductively heating to a temperature of 1500° C. in a platinum crucible under argon atmosphere.14. A lamp for emitting ultraviolet light claim 1 , the lamp comprising: a glass comprising SiOin an amount of at least 60.0 wt.-% and an amount of WOfrom 0.1 ppm to 60.0 ppm claim 1 , and tungsten is present in such oxidation states that a transmittance of the glass at a wavelength of 260 nm is at least 75.0%.17. The lamp of claim 14 , wherein the glass comprises less than 10 ppm FeO.18. The lamp of claim 14 , wherein the glass comprises less than 10 ppm TiO.19. The lamp of claim 14 , wherein the glass comprises less than 10 ppm NiO.20. The lamp of claim 14 , wherein ...

Vacuum refining unit for a glass melt

A vacuum refining unit wherein, with a vacuum pump connected via a suction line, a vacuum is created above a glass melt to be refined. A valve for supplying secondary air from the atmosphere, for maintaining the pressure conditions in the vacuum unit constant, branches off the suction line. Refining is improved because the vacuum circuit has a controllable leak which provides an inflow of secondary air as a function of different measuring values and thus provides constant refining conditions.

Process and device for production of molten glass

The invention concerns a process and a device from the production of molten glass. According to the invention, measures will be taken to lead the current of the molten glass through the tank furnace so that cutoffs of the glass current between the surface of the glass bath, on the one hand, and the outlet opening on the other hand are avoided and a an equal holding period of all melt particles in the tank furnace is achieved.

Method of making glass, a method and device for the control and setting of the redox state of redox fining agents in a glass melt

There is now provided a method and a device for the control and setting of the redox state of redox fining agents in a glass melt, in which method, during the melting process, essentially oxygen gas is blown through the glass melt.

Method and apparatus for heating melts

A method and an apparatus for heating a melt in a melting vessel with cooled walls is provided. The melt is heated conductively by current flowing between at least two cooled electrodes, which each replace part of the wall of the melting vessel.

GLASS HAVING HIGH UV TRANSMITTANCE AND HIGH SOLARIZATION RESISTANCE

A glass includes SiOin an amount of at least wt.-% and an amount of MoOfrom ppm to ppm. Molybdenum is present in such oxidation states that a transmittance at a wavelength of nm is at least % at a reference thickness of mm. 1. A glass , comprising SiOin an amount of at least 60.0 wt.-% and an amount of MoOfrom 0.1 ppm to 30.0 ppm , wherein molybdenum is present in such oxidation states that a transmittance at a wavelength of 260 nm is at least 65.0% at a reference thickness of 1.0 mm.4. The glass of claim 1 , wherein the glass comprises less than 10 ppm FeO.5. The glass of claim 1 , wherein the glass comprises less than 10 ppm TiO.6. The glass of claim 1 , wherein the glass comprises less than 10 ppm NiO.7. The glass of claim 1 , wherein the glass comprises less than 10 ppm CrO.8. The glass of claim 1 , wherein the glass comprises Cl in an amount of more than 100 ppm.9. The glass of claim 1 , wherein a proportion of ZrOin the glass is less than 0.5 wt.-%.10. The glass of claim 1 , wherein a transmittance at a reference thickness of 1.0 mm and a wavelength of 260 nm after irradiation with a HOK 4 lamp for 144 hours is at least 54.0%.13. The glass of claim 1 , wherein a partial pressure of oxygen (pO) in a glass melt at a temperature of 1500° C. is 0.5 bar or less claim 1 , when the glass melt is produced from the glass by inductively heating to a temperature of 1500° C. in a platinum crucible under argon atmosphere.14. A lamp claim 1 , comprising:{'sub': 2', '3, 'a glass comprising SiOin an amount of at least 60.0 wt.-% and an amount of MoOfrom 0.1 ppm to 30.0 ppm, wherein molybdenum is present in such oxidation states that a transmittance at a wavelength of 260 nm is at least 65.0% at a reference thickness of 1.0 mm.'}17. The lamp of claim 14 , wherein the glass comprises less than 10 ppm FeO.18. The lamp of claim 14 , wherein the glass comprises less than 10 ppm TiO.19. The lamp of claim 14 , wherein the glass comprises less than 10 ppm NiO.20. The lamp of claim 14 ...

BOROSILICATE GLASS ARTICLE

A glass article is composed of a glass having a demixing factor in respect of its hydrolytic resistance in a range from 0.10 to 1.65. 1. A glass article , composed of a glass having a demixing factor in respect of its hydrolytic resistance in a range from 0.10 to 1.65.2. The glass article of claim 1 , having an induced extinction α(λ) of not more than 0.300 at 200 nm after irradiation with a deuterium lamp for at least one of 48 hours or 96 hours.3. The glass article of claim 1 , wherein the glass has a molar ratio of BOto BaO of at least 8 and not more than 20.4. The glass article of claim 3 , wherein the molar ratio of BOto BaO is at least 10 and not more than 15.5. The glass article of claim 1 , wherein the glass has a hydrolytic class in accordance with ISO 719:1989-12 of HGB3 claim 1 , HGB2 or HGB1.6. The glass article of claim 1 , wherein the glass article has a fusion stress with at least one of:a metal or a metal alloy having a coefficient of thermal expansion of 5.4 ppm/K in a range from −400 to −130 nm/cm; ora glass having a coefficient of thermal expansion of 5.0 ppm/K in a range from >0 to 300 nm/cm.7. The glass article of claim 1 , wherein at least one of the following is satisfied:the glass article has a transmission of at least one of at least 70% at 254 nm measured at a specimen thickness of 1 mm or at least 40% at 200 nm measured at a specimen thickness of 1 mm;the glass has a ratio of a transmission at 254 nm to a transmission at 200 nm, in each case measured at the specimen thickness of 1 mm, of at least 1.00 and not more than 2.00;the glass article has a thickness of at least 5 mm; orthe glass article has a thickness of up to 20 mm.8. The glass article of claim 1 , wherein at least one of the following is satisfied:the glass has a ratio of a proportion of CaO in the glass to BaO, in each case in mol %, of less than 2.0; or{'sub': 2', '3', '2', '2', '2', '3, 'a ratio of a sum of contents (in mol %) of BO, RO and RO to a sum of contents (in mol %) ...

Method for heating molten glass and glass article

A glass article is designed at least in part in the form of a glass tube element including at least one shell which encloses at least one lumen. For at least one light transmission analysis of the glass article, a ratio of an average amplitude transmission factor and a specific amplitude transmission factor is greater than 1.00001.

Tube-drawable glass, method for the production and use

A glass has a maximum crystallization rate (KGmax) of at most 0.20 μm/min in a temperature range of 700° C. to 1250° C. and a hydrolytic stability according to a hydrolytic class 1 HGA1 according to ISO 720:1985. In the case of a sample thickness of 2 mm of the glass, a ratio of a minimum transmittance in a wavelength range of 850 nm to 950 nm to a maximum transmittance in a wavelength range of 250 nm to 700 nm is in a range of 1.9:1 to 15:1.

Prestress by use of a gradient material

The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

Boron-poor zirconium-free neutral glass with optimized alkali ratio

Die Erfindung betrifft ein Zirkonium-freies Neutralglas, bevorzugt zur Verwendung im Pharmabereich, das die nachfolgenden Komponenten in Gew.-% aufweist oder daraus besteht:SiO2 72–82 B2O3 3–8 Al2O3 5–8 Na2O 2,5–5,5 K2O 3,6–8,4 Li2O 0–0,7 MgO 0–0,7 CaO 0–0,4 TiO2 0–5 Li2O + Na2O + K2O 6,8–14,6 Verhältnis K2O/Na2O 0,7–3,4 Durch die spezielle Kombination der Alkalioxide von Natrium, Kalium und ggf. Lithium, sowie eine gezielte Menge an Aluminiumoxid wird ein Zirkonium-freies, Bor-armes Neutralglas bereitgestellt, dass eine gute hydrolytische Beständigkeit, gute Säure- und Laugenbeständigkeit und gute Entglasungseigenschaften aufweist und daher hervorragend für die Verwendung als Pharmaprimärpackmittel geeignet ist.

Heating device comprising an electrode for the conductive heating of melts

The invention relates to a heating device (1) for the conductive heating of melts, in particular for the rapid fusion, refining and/or conditioning of melts, said device permitting improved cooling. Said heating device comprises at least one electrode (3), in addition to a first cooling system, whose cooling power can be variably set and/or regulated.

Pharmaceutical packaging means with a chemically resistant glass

Es wird ein Pharmapackmittel angegeben, das ein Glas aufweist, das zumindest die folgenden Bestandteile (in Mol-% auf Oxidbasis) enthält: SiO 2 : 59 - 84, Al 2 O 3 : 7 - 18,5, CaO: 1 - 25, SrO: 0 - 6,5, BaO: 0 - 5, ZrO 2 : 0 - 3, TiO 2 : 0 - 5, B 2 O 3 : 0 - 1, wobei das Verhältnis (CaO+SrO+BaO)/Al 2 O 3 < 2,8, wobei das Verhältnis (CaO+SrO+BaO)/SiO 2 ‰¤ 0,39 ist, wobei die hydrolytische Beständigkeit nach DIN ISO 720 Klasse HGA 1 ist, und wobei das Glas, bis auf unvermeidbare Verunreinigungen, frei von Alkalioxiden und Magnesiumoxiden ist. There is provided a pharmaceutical packaging comprising a glass containing at least the following constituents (in mole percent based on oxide): SiO 2: 59-84, Al 2 O 3: 7-18.5, CaO: 1-25, SrO: 0 - 6.5, BaO: 0 - 5, ZrO 2: 0 - 3, TiO 2: 0 - 5, B 2 O 3: 0 - 1, wherein the ratio (CaO + SrO + BaO) / Al 2 O 3 <2.8, wherein the ratio (CaO + SrO + BaO) / SiO 2 ‰ ¤ 0.39, wherein the hydrolytic resistance according to DIN ISO 720 class is HGA 1, and wherein the glass, except for unavoidable impurities, free of alkali oxides and magnesium oxides.

Toughenable glass with high hydrolytic resistance and reduced color tinge

Method and apparatus for regulating and adjusting the redox state from redox-refining means in a glass melt

Process for controlling and adjusting the redox state of redox of refining agents in a glass melt comprises blowing oxygen gas through the glass melt during melting. An Independent claim is also included for a device for controlling and adjusting the redox state of redox of refining agents in a glass melt comprising nozzles for blowing oxygen gas through the melt arranged in the melting region of the melt. Preferred Features: The oxygen gas is blown from below to above through the melt.

Process for producing tubes of alkali-rich, barium-free aluminosilicate glasses, alkali-rich BaO-free aluminosilicate glass tube and its use

Die Erfindung betrifft ein Verfahren zur Herstellung von alkalireichen Aluminosilicatgläsern mit einem Gehalt (in mol-% auf Oxidbasis) an Alkalioxiden von 4 - 16 mol-%, an AlOvon wenigstens 4 mol-% und an BOvon 0 - 4 mol-%, wobei dem Glasgemenge 0,15 mol-% bis 0,9 mol-% Chlorid(e) und wenigstens ein Läutermittel aus der Gruppe Sulfat(e) (angegeben als SO), CeOzugegeben wird und wobei die Gesamtsumme zugegebener Läutermittel im Gemenge 0,17 mol-% bis 1,3 mol-% beträgt. The invention relates to a process for the preparation of alkali-rich aluminosilicate glasses with an oxide content (in mole%) of alkali oxides of 4-16 mol%, AlO of at least 4 mol% and BO of 0-4 mol%, wherein the Glasgemenge 0.15 mol% to 0.9 mol% of chloride (e) and at least one refining agent from the group sulphate (s) (indicated as SO), CeO added and wherein the total amount of added refining agent in the mixture of 0.17 molar % to 1.3 mol%.

Method for the production of glass by processing a production aggregate, comprises heating a glass melt using alternating current by electrodes, which protrude in the glass melt, which consists of redox-buffer

Bei der Glasherstellung kommt die Glasschmelze (FS) mit Produktionsaggregaten (z. B. Schmelzwannen SW, Tiegel, Rührstäbe RS) in Kontakt, die metallische Beschichtungen oder Bauteile aufweisen. Wird elektrischer Wechselstrom zur Beheizung verwendet, kann es zu einer strombedingten Bildung von Gasblasen kommen (sog. Sekundärblasen). Um dies zu vermeiden wird vorgeschlagen, dass, wenn eine Glasschmelze (FS) verwendet wird, die einen geringen Gehalt an Redox-Puffern aufweist, der z. B. kleiner als 5000 ppm ist, dass dann geprüft wird, ob in der Glasschmelze sich ein Gleichstrom mit einer Stromdichte ausbildet, die einen kritischen Schwellwert übersteigt. Denn die Erfindung geht von der Erkenntnis aus, dass die Blasenbildung insbesondere durch Gleichströme verursacht wird, die durch Gleichrichtereffekt auftreten. Als Gegenmaßnahme wird eine Erhöhung der Wechselstrom-Frequenz und/oder das Anlegen einer DC-Gegenspannung vorgeschlagen.

Method and device for controlling and setting the redox state of redox refining agents in a glass melt

Es wird ein Verfahren und eine Vorrichtung zur Steuerung und Einstellung des Redoxzustandes von Redox-Läutermitteln in einer Glasschmelze geschrieben, dabei wird bei dem Verfahren während des Einschmelzvorgangs im wesentlichen Sauerstoffgas durch die Glasschmelze geblasen. A method and a device for controlling and adjusting the redox state of redox refining agents in a glass melt is written, with the method essentially blowing oxygen gas through the glass melt during the melting process.

Process and apparatus for producing a glass melt

Die Erfingung betrifft ein Verfahren zum Herstellen einer Glasschmelze aus Gemenge oder Scherben, mit den folgenden Verfahrensschritten: es werden Gemenge oder Scherben (2.1) in eine fossil beheizte Schmelzwanne (1) eingetragen und geschmolzen; die Schmelze wird durch eine Auslassöffnung (1.1) aus der Schmelzwanne entlassen; es werden Maßnahmen getrofen, um die Strömung der Glasschmelze derart durch die Schmelzwanne hindurchzuführen, dass Kurzschlüsse der Glasströmung zwischen der Oberfläche (2.3) des Glasbades einerseits und der Auslassöffnung (1.1) andererseits vermieden, und eine ausreichende Verweildauer aller Schmelzepartikel in der Schmelzwanne erzielt werden; dadurch gekennzeichnet, dass die Schmelze im Bereich (5) der Auslassöffnung zusätzlich aufgeheizt oder durch Strömungshindernisse umgelenkt wird. The invention relates to a method for producing a glass melt from mixtures or shards, comprising the following method steps: Mixtures or shards (2.1) are introduced into a fossil-heated melting tank (1) and melted; the melt is discharged from the melting tank through an outlet opening (1.1); Measures are taken to pass the flow of glass melt through the melting tank in such a way that short circuits of the glass flow between the surface (2.3) of the glass bath on the one hand and the outlet opening (1.1) on the other hand are avoided, and a sufficient residence time of all melt particles in the melting tank is achieved; characterized in that the melt in the region (5) of the outlet opening is additionally heated or deflected by flow obstacles.

Method for cleaning and treating lamp glass tubes comprises washing the glass tubes with an aqueous washing medium at a specified pH and temperature

Method for cleaning and treating lamp glass tubes comprises washing the glass tubes with an aqueous washing medium at a pH of 7-12 and a temperature of 20-80[deg] C.

Apparatus and method for melting and refining a molten glass and using the apparatus

Vorrichtung zum Schmelzen und Läutern einer Glasschmelze, mit einem Einschmelzabschnitt (2) und einem nachgeordneten und von dem Einschmelzabschnitt getrennten Läuterabschnitt (6) zum Läutern der Glasschmelze, wobei der Einschmelzabschnitt (2) aus zwei Einschmelzwannen (10a, 10b) besteht, die voneinander getrennt und unabhängig voneinander betreibbar und mit dem Läuterabschnitt (6) verbunden sind, dadurch gekennzeichnet, dass den Einschmelzwannen jeweils ein erster Auslass zum Auslassen der Glasschmelze in den Läuterabschnitt und ein zweiter Auslass zum vollständigen Ablassen der Glasschmelze aus der jeweiligen Einschmelzwanne ohne in einen nachgeordeten Prozessabschnitt zu strömen zugeordnet ist, wobei die ersten Auslässe unabhängig voneinander verschliessbar sind. Device for melting and refining a glass melt, with a melting section (2) and a downstream refining section (6), which is separate from the melting section, for refining the glass melt, the melting section (2) consisting of two melting tanks (10a, 10b) which are separated from each other and can be operated independently of one another and are connected to the refining section (6), characterized in that each of the melting tanks has a first outlet for discharging the glass melt into the refining section and a second outlet for completely draining the glass melt from the respective melting tank without going into a downstream process section flow is assigned, wherein the first outlets can be closed independently of one another.

Toughening of a flat glass by creating a gradient in the surface composition

Die Erfindung betrifft Glasartikel, insbesondere Flachgläser, bei denen das oberflächliche Material durch eine gezielte Prozeßführung Gradientenmaterialeigenschaften hat, die wiederum zu einer Druckvorspannung der Oberfläche führen. Die Erfindung betrifft auch ein Verfahren zur Herstellung der Glasartikel sowie deren Verwendung. The invention relates to glass articles, in particular flat glasses, in which the surface material has gradient material properties as a result of a targeted process control, which in turn lead to a compressive prestressing of the surface. The invention also relates to a method for producing the glass articles and their use.

A vessel system for producing and refining a glass melt, and method for producing and refining a glass melt

This disclosure relates to a vessel system for producing and refining a glass melt, and a method for producing and refining a glass melt by means of which an excellent glass quality is achieved. A vessel system for producing and refining a glass melt comprises a melting vessel (101) for glass melting, a riser duct (201), a fining vessel (301) for refining a glass melt, and an optional vertical duct (401), wherein the riser duct (201) connects the melting vessel (101) to the fining vessel (301), wherein the fining vessel (301) is optionally suitable for purging the refined glass melt into the optional vertical duct (401).

Glass rod, set of glass rods, and process for the production of a glass rod

The present invention relates to glass rods, a set of glass rods, and a process for the production of a glass rod from a glass having a T4 temperature of at least 1400°C. The process comprises melting glass and withdrawing it to form a rod and adjusting temperature and/or pressure to control the glass melt withdrawal rate. Additionally, the invention relates to a flash lamp comprising the glass rod, and a use of a glass rod according to the invention for joining a metal article to a glass element and/or for a flash lamp.

Method and apparatus for making a glass product and corresponding glass product

Disclosed are a method and apparatus for making a glass product and a corresponding glass product. The method comprises electric heating of the raw materials and/or the glass melt at current frequencies between 1 kHz and 5 kHz and is characterized by a low carbon footprint. The apparatus may comprise coaxial shielding means on the connectors between the electrodes and the frequency changer and/or the supporting structure of the melter may comprise non-ferromagnetic materials. Low corrosion of the electrodes and low amount of bubbles in the glass are achieved.

Verfahren zur steuerung und einstellung des redoxzustandes von redox-läutermitteln in einer glasschmelze sowie kontinuierliches glasschmelzaggregat das mit mittel zur durchführung dieses verfahrens versehen ist

管引抜可能なガラス、その製造方法および使用

【課題】管引抜可能なガラス、殊に良好な耐加水分解性および良好な化学強化性を有する管引抜可能なガラス、前記ガラスの製造方法、および前記ガラスの使用を提供する。【解決手段】温度範囲７００℃〜１２５０℃において最高０．２０μｍ／分の最大結晶化速度（ＫＧmax）と、加水分解のクラス１（ＩＳＯ ７２０：１９８５によるＨＧＡ１）に準拠する耐加水分解性とを有するガラスであって、試料の厚さ２ｍｍで、波長範囲８５０ｎｍ〜９５０ｎｍにおける最小透過率の、波長範囲２５０ｎｍ〜７００ｎｍにおける最大透過率に対する比が１．９：１〜１５：１の範囲である、前記ガラス。【選択図】図１

Verfahren und vorrichtung zur unterdruck- läuterung einer glasschmelze

所定の内部形状を有するガラス管を製造する方法及び装置

【課題】ベロー法又はダウンドロー法に従って所定の内部形状を有するガラス管を製造する方法及び装置を提供する。 【解決手段】本発明に係る方法及び装置によると、溶融物チャンネル２の出口開口１２から流出した溶融ガラス６が成形部材３を超えて引き抜かれることにより中空の引抜き球状部５０が形成され、引抜き球状部５０が成形部材３の下流に配置された輪郭形成部材４を超えて引き抜かれることにより所定の内部形状が形成される。引抜き球状部５０内の操作位置への確実かつ安全な配置のために、輪郭形成部材４は、ガラス管５；５´の内部空間における操作位置に到達するまで、ガラス管５；５´の内部空間を介して成形部材３の下方から軸方向に移動されるか、又は成形部材３を支持するシャフト３０の内部孔３１を介して軸方向に移動される。 【選択図】図３ｄ

Verfahren und vorrichtung zum einschmelzen von glas

Die Erfindung betrifft ein Verfahren zum Einschmelzen von Glas, bei welchem für die Umwandlung eines Gemenges in eine Glasschmelze für zumindest einen Teil der zum Schmelzen zugeführten Energie Mikrowellenstrahlung verwendet wird, wobei die verwendete Mikrowellenstrahlung zumindest einen Teil des Übergangs zwischen Gemenge und Rauschmelze erfasst, sowie eine Vorrichtung zum Einschmelzen von Glas, insbesondere für die Umwandlung eines Gemenges in eine Glasschmelze, insbesondere zur Durchführung des Verfahrens, umfassend ein Schmelzaggregat mit einer Schmelzwanne, welche Wände aufweist, innerhalb derer sowohl das zu schmelzende Gemenge als auch das geschmolzene Gemenge als Glasschmelze aufnehmbar ist, wobei oberhalb des Gemenges sowie der Glasschmelze zumindest eine Mikrowellen emittierende Quelle, insbesondere zumindest ein Mikrowellenstrahler, angeordnet ist.

Prestress by use of a gradient material

The invention relates to glass articles, such as for example glass tubes or flat glasses, where the material at the surface by a targeted process control has gradient material properties which in turn result in a compressive prestress of the surface. The invention also relates to a method for the production of the glass articles as well as their use.

Prestressing a flat glass by generating a gradient in the surface composition

The invention relates to glass articles, in particular flat glasses, in the case of which the surface material has gradient material properties as a result of targeted process control which in turn lead to compressive prestressing of the surface. The invention also relates to a method for producing the glass articles and the use thereof.

Glass for radiation and/or particle detectors

The present disclosure relates to a glass for radiation detectors, in particular neutron detectors, UV detectors and neutrino detectors. The disclosure also relates to a method of producing such a glass and to the uses of such glass in radiation and/or particle detectors, in particular in neutron detectors, UV detectors or neutrino detectors. (Figure 2)

Method for eradicating pathogens

The present invention relates to methods for eradication of pathogens, especially to methods for eradicating bacteria in confined spaces. The method comprises the use of germicidal UV light at a wavelength of 220 nm, wherein the UV light is emitted by a UV lamp having a lamp cover made of 220 nm-UV-transparent glass. The present invention includes 220 nm-UV-transparent glass, uses of such UV-transparent glass as well as methods for making the same.

Method and apparatus for making a glass product and corresponding glass product

A method of making a glass product includes: melting a batch of raw materials to form a glass melt in a melting tank; heating the batch and/or the glass melt using two or more electrodes, the electrodes including an electrode material and heating the batch and/or the glass melt includes operating the electrodes at a current frequency of at least 1,000 Hz and at most 5,000 Hz; withdrawing the glass melt from the melting tank; and forming the glass melt into the glass product.

Verfahren und vorrichtung zur unterdruck-läuterung einer glasschmelze

Verfahren und Vorrichtung zur Unterdruck-Läuterung einer Glasschmelze mit einem Unterdruck-Apparat

医薬品容器用ガラス管、およびガラス管の製造方法

【課題】ガラス管内の望ましくない凝縮物および析出物の問題を解決し、医薬品容器用ガラス管を製造する間のばらつきおよび不安定性を解消する。【解決手段】医薬品容器用ガラス管であって、内部表面と外部表面とを有し、内径ｄiと外径ｄoとを有し、壁厚ＷＴと長さｌaとを有し、長手方向軸を有し、「耐加水分解性」はＩＳＯ ４８０２－２：２０１０に準拠して調製される溶出液中でのＮａ2Ｏ当量として特定される前記内部表面の区域におけるアルカリ浸出性の、前記壁厚に対する比率として定義され、第１の耐加水分解性は前記ガラス管の第１の個別の区域で特定され、且つ第２の耐加水分解性は前記ガラス管の第２の個別の区域で特定され、前記第１の個別の区域で特定された耐加水分解性と、前記第２の個別の区域で特定された耐加水分解性との絶対差は０．２０μｇ ｃｍ-2ｍｍ-1未満である。【選択図】図２

Glass for radiation and/or particle detectors

The present disclosure relates to a glass for radiation detectors, in particular neutron detectors, UV detectors and neutrino detectors. The disclosure also relates to a method of producing such a glass and to the uses of such glass in radiation and/or particle detectors, in particular in neutron detectors, UV detectors or neutrino detectors.

Method for heating molten glass and glass article

The present invention relates to a method for heating molten glass, the method comprising the steps of applying alternating current to electrodes in a glass melt, controlling the temperature of the glass by controlling the current frequency between 30 Hz and 15 kHz and/or by controlling the current density on the electrode surface to at most 3 A/cm 2 . The invention also relates to a glass article that is at least in part in form of a glass tube having certain optical transmission properties.

Method for heating molten glass and glass article

The present invention relates to a method for heating molten glass, the method comprising the steps of applying alternating current to electrodes in a glass melt, controlling the temperature of the glass by controlling the current frequency between 30 Hz and 15 kHz and/or by controlling the current density on the electrode surface to at most 3 A/cm 2 . The invention also relates to a glass article that is at least in part in form of a glass tube having certain optical transmission properties.

Glass for radiation and/or particle detectors

A glass has a transmittance at a reference thickness of 1.0 mm of at least 65.0% at a wavelength of 260 nm. An amount of ZrO2 in the glass is less than 150 ppm.

病原体の根絶方法

【課題】病原体の根絶方法、特に限られた空間における細菌の根絶方法を提供する。【解決手段】前記課題は、波長２２０ｎｍで殺菌性ＵＶ光を使用することを含み、前記ＵＶ光は、２２０ｎｍのＵＶ透過性ガラス製のランプカバーを有するＵＶランプによって放出される、病原体の根絶方法、２２０ｎｍのＵＶ透過性ガラス、そのようなＵＶ透過性ガラスの使用、並びにその製造方法によって解決される。【選択図】なし

Aluminosilicate glass

The present invention relates to an aluminosilicate glass having excellent hydrolytic resistance and low devitrification tendency. The invention also relates to a method of producing the glass and to uses of the glass, in particular for pharmaceutical packaging.

Aluminosilicate glass

A glass includes the following components in the indicated amounts (in mol %): 64.5-73.0 SiO2; 4.0-11.0 Al2O3; 0-0.2 B2O3; 0-3.5 Na2O; 0-4.0 K2O; 0.1-7.0 MgO; 3.0-15.0 CaO; 0-10.0 SrO; 0-5.0 BaO; 0-0.5 ZnO; 0.1-7.5 R2O, where R2O indicates a sum of the molar amounts of Na2O and K2O; and >15.0-22.5 RO, where RO indicates a sum of the molar amounts of MgO, CaO, SrO, BaO and ZnO.

Method of making high quality glass products from high viscosity melts

The disclosure relates to high quality glass products, methods of making them and their use.

Verfahren und Vorrichtung zur Unterdruck-Läuterung einer Glasschmelze mit einem Unterdruck-Apparat

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Unterdruck-Läuterung einer Glasschmelze mit einem Unterdruck-Apparat, in dem die Glasschmelze über ein Steigrohr einer Läuterbank zugeführt und über ein Fallrohr aus der Läuterbank wieder abgeführt wird, wobei über dem Glasfluß in der Läuterbank ein Unterdruck erzeugt wird, wobei vorgesehen ist, daß das Steigrohr und/oder das Fallrohr und/oder die Läuterbank wenigstens ein Bauteil aus wenigstens einem Refraktärmetall und/oder aus einer Refraktärmetall-Legierung als Glaskontaktmaterial aufweist.

Glass tube for pharmaceutical containers and manufacturing process for a glass tube

ガラスロッド、ガラスロッドのセット、およびガラスロッドの製造方法

【課題】完全に自動化されたロボット制御プロセスにおいてフラッシュランプを製造するためのガラスロッドを提供する。【解決手段】長さｌrod、平均半長軸長ｌmajor(a)および平均半短軸長ｌminor(a)を有するガラスロッドであって、前記長さｌrodが１００～１６００ｍｍであり、前記ガラスロッドの断面内で、ｌmajor(n)は前記断面の質量中心から前記断面内でのガラスロッドの最も遠い境界までの距離であり、且つｌminor(n)は前記断面の質量中心から前記断面内でのガラスロッドの最も近い境界までの距離であり、ｌmajor(n)とｌminor(n)とは同一または異なることができ、前記ガラスロッドはガラスが１０4ｄＰａ・ｓの粘度を有する温度として定義されるＴ４温度１４００℃以上を有するガラス組成物を含む前記ガラスロッドである。【選択図】図１

Glass product, glass composition, and method of making a glass product

The disclosure relates to a glass product or glass composition, and to a method of making a glass product. The glass composition can be manufactured without inhomogeneities in the glass melt and with sufficiently uniform and isotropic properties in the obtained products. The glass compositions further minimise and/or overcome the problem of blockage of pipes, liners, ducts or nozzles during the manufacture of high-quality glasses.

Tubulure

L'invention concerne une tubulure destinée à conduire un bain de verre fondu ou à être plongée dans un tel bain ainsi qu'à le chauffer. La tubulure selon l'invention comprend : . un noyau porteur (1) fait d'une matière à haute résistance à la température,. une gaine (2) conductrice de l'électricité qui entoure entièrement le noyau porteur et qui comprend un manchon intérieur (2. 1), en contact avec le bain de verre fondu, ainsi qu'un manchon extérieur (2. 2), les deux manchons étant assemblés, à une extrémité du noyau porteur, par une liaison étanche au gaz et conductrice de l'électricité, et connectés chacun, à l'autre extrémité du noyau porteur, à une électrode; . une barrière de diffusion (4. 3, 4. 4) isolante de l'électricité agencée entre le noyau porteur et la gaine,. le vide pouvant être fait dans l'espace entouré par la gaine.